Question

Найдите производную: y=x^2-1x^2+1

Answer 1

У=х^2-1/х^2+1=у=-1+1=0 ответ:0

Answer 2

y$y` = frac{(x^2-1)` * x^2+1 - (x^2-1) * (x^2+1)` }{(x^2+1)^2}$ 
$= frac{2x*(x^2+1)-(x^2-1)*2x}{(x^2+1)^2} = frac{2x^3+2x^2-2x^3+2x}{(x^2+1)^2}$ 
$= frac{2x^2+2x}{(x^2+1)^2}$